Tennant M17 Series, Service Information Manual

Page: 110 / 236

4-14
TROUBLESHOOTING
Curtis 123 2SE Controller Diagnostic Codes, continued
13
14
15
16
17 Severe Undervoltage
Reduced drive torque.
TROUBLESHOOTING CHART
FAULT CONDITION
CODE
EFFECT OF FAULT
POSSIBLE CAUSE SET/CLEAR CONDITIONS
12 Controller Overcurrent
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake;
ShutdownPump.
1. Leakage to vehicle frame from phase
U, V, or W (short in motor stator).
2. Controller defective.
Current Sensor Fault
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake;
ShutdownPump.
1. External load on capacitor bank (B+
connection terminal) that prevents
the capacitor bank from charging.
2. See Monitor menu » Battery:
Capacitor Voltage.
Precharge Failed
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake;
ShutdownPump.
1. See Monitor menu » Controller:
Temperature.
2. Controller is operating in an extreme
environment.
Controller Severe Undertemp
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake;
ShutdownPump.
1. See Monitor menu » Controller:
Temperature.
2. Controller is operating in an extreme
environment.
3. Excessive load on vehicle.
4. Improper mounting of controller.
Controller Severe Overtemp
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake;
ShutdownPump.
1. Battery Menu parameters are
misadjusted.
2. Non-controller system drain on
battery.
3. Battery resistance too high.
4. Battery disconnected while driving.
5. See Monitor menu » Battery:
Capacitor Voltage.
6. Blown B+ fuse or main contactor
did not close.
Set: Controller current sensors have
invalid o˜ set reading.
Clear: Cycle KSI.
Set: Phase current exceeded the
current measurement limit.
Clear: Cycle KSI.
Set: Precharge failed to charge the
capacitor bank to the KSI voltage.
Clear: Cycle interlock input or use VCL
function.
Set: Heatsink temperature below -40°C.
Clear: Bring heatsink temperature
above -40°C, and cycle interlock or KSI.
Set: Heatsink temperature above +95°C.
Clear: Bring heatsink temperature
below +95°C, and cycle interlock or KSI.
Set: Capacitor bank voltage dropped
below the severe undervoltage limit
with FET bridge enabled.
Clear: Bring capacitor voltage above
severe undervoltage limit.
1. External short of phase U, V, or W
motor connections.
2. Motor parameters are mis-tuned.
3. Controller defective.
PMC003
Terms:
KSI = Key Switch Interlock
FET = F ield-Eff ect Transistor
M17 Service Information 90 17358 ( 08 - 20 16)